From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: mingo@kernel.org, tglx@linutronix.de
Cc: maxime.ripard@free-electrons.com, richard@nod.at,
linux-kernel@vger.kernel.org
Subject: [PATCH 4/4] clocksource: sun5i: Fix cpufreq interaction with sched_clock
Date: Thu, 26 Mar 2015 10:27:09 +0100
Message-ID: <1427362029-6511-4-git-send-email-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <1427362029-6511-1-git-send-email-daniel.lezcano@linaro.org>
From: Maxime Ripard <maxime.ripard@free-electrons.com>
The sched_clock we use on some system is this timer, and since we
started using cpufreq, the cpu clock (that is one of the timer's clock
indirect parent) now changes, along with the actual sched_clock rate.
We can safely remove the sched_clock on those systems, since we have
other reliable sched_clock in the system.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/clocksource/timer-sun5i.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
index 5dcbf90..58597fb 100644
--- a/drivers/clocksource/timer-sun5i.c
+++ b/drivers/clocksource/timer-sun5i.c
@@ -17,7 +17,6 @@
#include <linux/irq.h>
#include <linux/irqreturn.h>
#include <linux/reset.h>
-#include <linux/sched_clock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
@@ -137,11 +136,6 @@ static struct irqaction sun5i_timer_irq = {
.dev_id = &sun5i_clockevent,
};
-static u64 sun5i_timer_sched_read(void)
-{
- return ~readl(timer_base + TIMER_CNTVAL_LO_REG(1));
-}
-
static void __init sun5i_timer_init(struct device_node *node)
{
struct reset_control *rstc;
@@ -172,7 +166,6 @@ static void __init sun5i_timer_init(struct device_node *node)
writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
timer_base + TIMER_CTL_REG(1));
- sched_clock_register(sun5i_timer_sched_read, 32, rate);
clocksource_mmio_init(timer_base + TIMER_CNTVAL_LO_REG(1), node->name,
rate, 340, 32, clocksource_mmio_readl_down);
--
1.9.1
next prev parent reply index
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5513D019.3050503@free.fr>
2015-03-26 9:27 ` [PATCH 1/4] clocksource: sh_cmt: Fix !HAS_IOMEM build Daniel Lezcano
2015-03-26 9:27 ` [PATCH 2/4] clocksource: sh_mtu2: " Daniel Lezcano
2015-03-26 9:27 ` [PATCH 3/4] clocksource: sh_tmu: " Daniel Lezcano
2015-03-26 9:27 ` Daniel Lezcano [this message]
2015-03-26 13:46 ` [tip:timers/urgent] clocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock() tip-bot for Maxime Ripard
2015-03-26 13:46 ` [tip:timers/urgent] clocksource/drivers: Fix various !CONFIG_HAS_IOMEM build errors tip-bot for Richard Weinberger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1427362029-6511-4-git-send-email-daniel.lezcano@linaro.org \
--to=daniel.lezcano@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maxime.ripard@free-electrons.com \
--cc=mingo@kernel.org \
--cc=richard@nod.at \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
LKML Archive on lore.kernel.org
Archives are clonable:
git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git
git clone --mirror https://lore.kernel.org/lkml/8 lkml/git/8.git
git clone --mirror https://lore.kernel.org/lkml/9 lkml/git/9.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
linux-kernel@vger.kernel.org
public-inbox-index lkml
Example config snippet for mirrors
Newsgroup available over NNTP:
nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git